You can swap out the removable sunglass lenses for clear versions, or throw in your prescription in daylight (tinted) or indoor flavors, since many optical stores stock appropriately sized lenses.

ENGADGET: Insert Coin: Eyez 720p video-recording glasses (video)

Applying optical theory to O. wendtii lenses suggests that they would, indeed, behave in that way.

ECONOMIST: Brittlestar eyes

Reeve's Superman soared thanks to a combination of traditional wirework, optical processing and the synchronising of zoom lenses in camera and projector.

BBC: By James Christie

University College London's part in the project has been to design and build an optical corrector for the camera - an array of five massive lenses that sit at the primary focus of the camera.

BBC: Getting the measure of dark energy

Besides having unusual optical properties and being very small each is just one-twentieth of a millimetre in diameter the lenses have another trick of particular relevance to micro-optical systems.

ECONOMIST: REPORTS

Supporting the D600 is Nikon's heritage in optical excellence, more than 70 NIKKOR AF and AF-S compatible lenses for maximum versatility.

ENGADGET: Nikon unveils lightweight, full-frame D600 DSLR -- hands-on and low-light samples (video)

Panasonic's new compact 3D lens for the LUMIX G Micro System features two optical systems installed within the diameter of the lens mount, creating stereo images from the left and right lenses that are then processed with a 3D image processing system.

ENGADGET: Panasonic's $900 Lumix GH2 officially debuts: 16MP, 1080p movie mode, 3D interchangeable lens